Development and commissioning of a new readout system for the gas flow of the Belle II $K_L^0$ and muon detector

TL;DR

This paper presents the design and deployment of a new readout system for monitoring gas flow in the Belle II detector's resistive plate chambers, enhancing real-time detection and alarm integration.

Contribution

The paper introduces a novel readout board specifically designed for gas flow detection in Belle II's detector, with successful commissioning and integration into the existing alarm system.

Findings

System successfully monitored gas flow during data-taking period.

Real-time alarm integration improved detector safety.

First implementation of bubbler-monitoring in Belle II.

Abstract

We have designed and commissioned a new readout board to detect photosensor signals from gas-bubbler panels to continuously monitor the gas flow through the resistive plate chambers of the $K_L^0$ and muon detector of Belle II. The gas flow measurements have been integrated into Belle II's alarm system. The bubbler-monitoring system was first employed during the February 2024 to July 2024 Belle II data-taking period.